An exterior angle of a triangle is of measure 70° and one of its interior opposite angle is of measure 25°. Find the measure of the other interior opposite angle.
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An exterior angle of a triangle is of measure 70° and one of its interior opposite angle is of measure 25°. Find the measure of the other interior opposite angle.
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An exterior angle of a triangle is of measure 70° and one of its interior opposite angle is of measure 25°. Find the measure of the other interior opposite angle.
➣ An exterior angle of a triangle = 70°
➣ One of the opposite interior angle of the exterior angle = 25°
➣ The other interior opposite angle
➪ Let the other interior opposite angle = x
➪ Sum of interior opposite angles of a triangle is equal to the exterior angle of triangle
➪ Exterior angle of a triangle = Sum of its interior opposite angle
⇒ 70° = 25° + x
⇒ x = 70° - 25°
⇒ x = 45°
➦ So, the measure of the other interior opposite angle is 45°